Air taken in with the toner supply cooling fan (FAN5) is guided to circulate around the toner bottle and is discharged from the side of the delivery tray to outside the machine. It is aimed to achieve heat insulation from the stack of paper to the toner bottle by reducing the melting point of the toner. Keep in mind that the shape of the duct differs in IM C4500/C5500/C6000 and IM C3500/C3000/C2500/C2000.